<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头部区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="图标" />
      </div>
      <!-- 登录表单区域 -->
      <el-form
        label-width="0"
        class="login_form"
        :model="loginForm"
        v-bind:rules="loginFormRules"
        ref="loginFormRef"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input
            prefix-icon="iconfont icon-user"
            v-model="loginForm.username"
          ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            prefix-icon="iconfont icon-3702mima"
            v-model="loginForm.password"
            type="password"
          ></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 登录表单的数据绑定对象
      loginForm: { username: "admin", password: "123456" },
      // 表单验证规则对象
      loginFormRules: {
        // 验证用户名合法性
        username: [
          { required: true, message: "please input username", trigger: "blur" },
          {
            min: 3,
            max: 5,
            message: "username length must between 3 and 5",
            trigger: "blur"
          }
        ],
        // 验证密码的合法性
        password: [
          {
            required: true,
            message: "please input login password",
            trigger: "blur"
          },
          {
            min: 6,
            max: 15,
            message: "password length must btetween 6 and 15",
            trigger: "blur"
          }
        ]
      }
    };
  },
  methods: {
    // 点击按钮重置登录表单
    resetLoginForm() {
      // this 指向当前的单文件组件
      this.$refs.loginFormRef.resetFields();
    },
    login() {
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return;
        const { data: res } = await this.$http.post("login", this.loginForm);
        if (res.meta.status !== 200) {
          return this.$message.error("Access Denied!");
        }
        this.$message.success("Success Login!");
        window.sessionStorage.setItem("token", res.data.token);
        this.$router.push("/home");
      });
    }
  }
};
</script>

<style lang="less" scoped>
.login_container {
  height: 100%;
  background-color: #2b4b6b;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.avatar_box {
  height: 140px;
  width: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #fff;
  img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
